Horseshoe-calk.



PATENTED JULY '7, 1908.

0. SPRISTBR.

HORSBSHOE GALK.

APPLICATION FILED FEB 24, 1908 INVEN T0 R.

WI T/VESSEQS 4 {14 1% n T'TORNE ms.

UNITED STATES PATENT OFFICE.

OTTO SPRISTER, OF APPLETON. WISCONSIN.

HORSE SHOE -CALK.

To all whom it may concern:

Be it known that I, OTTO SPRISTER, residing in Appleton, in the countyof Outagamie and State of Wisconsin, have invented new and useful Imrovements in Horseshoe- Calks, of which the following is a description,reference being had to the accompanying drawings, which are a part ofthis specification.

This invention has for its object to provide a removable toe calk forhorse shoes which is formed by a pair of independent calk membersthreading into the horse shoe with means for locking them together toconstitute in effect a single broad toe calk.

With the above and other objects in View the invention consists in thehorse shoe calks herein claimed and described and all equivalents.

Referring to the accompanying drawings in which like characters ofreference indicate the same parts in the several views; Figure 1 is aplan view of a horse shoe provided with calks constructed in accordancewith this invention Fig. 2 is a sectional end view thereof on the planeof line 22 of Fig. 1; and, Fig. 3 is a sectional view thereof on theplane of line 3 3 of Fig. 1.

In these drawings 5 represents a horse shoe of ordinary constructionprovided with threaded openings 6. at the heel and toe portion toreceive threaded calks, the heel calks 7 being simply blocks of hardenedmetal provided with screw stems 8 threading into the openings 6 at theheel portions of the horse shoe. The toe calks 9, however, are in theform of half sections of an ordinary broad toe calk, with threaded stems10 near their ends turning into the threaded openings 6 at the toeportion of the horse shoe, said toe calks when screwed tightly intoplace, coming close together and preferably engaging each other at theirfront edges to form in effect a continuous single toe calk. A lockingscrew 11 is threaded in an o ening 12 formed partly in each of the toeca ks 9 and has a pointed conical end biting into a recess 13 in the toeof the horse shoe so that when it is tightly screwed into place it looksthe toe calks against turning and consequently prevents their removal.The rear edges of t e meeting ends of the toe calks are somewhat roundedas shown at 14 to permit their clearance when they are being turned intoposition, each being preferably turned to the position shown in dottedlines with only a quarter Specification of Letters Patent.

Application filed February 24, 1908.

Patented July '7, 1908.

Serial No. 417,274.

turn necessary to give it its final movement, and then the calk on theright of Fig. 1 being turned into its final position so that the calk onthe left may be turned into its final position without binding owing toits rounded surface 14. Of course if it is more convenient the screwplugs 10 may be oppositely threaded so that one has a right hand threadand the other a left hand thread if desired, but it is found in practicethat the two calks may be made to properly come together at their edgeswithout binding when the screw stems 10 are made sufficiently below themiddle of the calks with the stems 10 threaded alike.

The conical sharpened point of the locking screw 11 revents the lockingscrew from engaging t e threads of the opening 12 for a short distancefrom the horse shoe so that when the toe calks have worn to this pointthe remainder of the screw 11, which of course wears therewith, is leftwithout a threaded engagement and conse uently drops out of place,permitting the cal (s 9 to Work loose and be detached so that new onesmay be substituted therefor or the winter calks may be provided as abovedescribed.

The resent invention is particularly designed or summer use, in winterit being the object to provide sharp calks to prevent slip ing, and thenscrew plug calks similar to t e heel calks 7 are substituted for the toecalks 9 as being less liable to slippage. During the summer, however,the broad toe calk is more desirable and the toe calks of the presentinvention are then em loyed, though if desirable these calks may lgeused at all times.

By means of this invention a toe calk of considerable length is rigidlythough detachably secured to the horse shoe in a manner which renders itdurable and efficient in its use and not liable to work loose or becomeWhat I claim as my invention is:

1. In combination with a horse shoe provided with threaded openings, acalk comprising calk sections having threaded stems engaging in thethreaded openings of the horse shoe, and a locking screw located betweenthe calk sections and threaded to each of them and engaging the horseshoe to prevent the calk sections from turning.

2. In combination with a horse shoe having threaded openin s, a calkcomprising calk sections provide with threaded stems engaging in thethreaded openings of the end, there being a recess in the horse shoe tohorse shoe, said calks engaging each other receive the pointed end ofthe locking screw. 13

end to end to form a continuous broad calk, In testimony whereof, Iaflix my signature. said calks also being provided with recesses inpresence of two witnesses.

at their meeting edges forming a threaded OTTO SPRISTER.

o ening between them, and a locking screw WVitnesses: o t readedin thethreaded opening between the J. H. COOK,

oalk sections and provided with a pointed F. J. RooNEY.

